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551: Difference between revisions
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Unlike the [[555]], it has only one set of horizontal deflection plates and the trigger and sweep circuitry are built in to the mainframe. | Unlike the [[555]], it has only one set of horizontal deflection plates and the trigger and sweep circuitry are built in to the mainframe. | ||
The vertical amplifiers of the [[545|545A]], 551, and 555 are identical. The 551 uses an L-C [[delay line]] for each vertical channel. | The vertical amplifiers of the [[545|545A]], 551, and [[555]] are identical. The 551 uses an L-C [[delay line]] for each vertical channel. | ||
Like the 555, the 551 has two parts, the "indicator unit" containing the signal path electronics and CRT, and an external power supply unit. | Like the [[555]], the 551 has two parts, the "indicator unit" containing the signal path electronics and CRT, and an external power supply unit. | ||
The external power supplies of the 555 and 551 are not interchangeable, however, the cable that connects the power supply to the indicator unit (part number [[012-032]]) is the same for the 551 and the 555. | The external power supplies of the [[555]] and 551 are not interchangeable, however, the cable that connects the power supply to the indicator unit (part number [[012-032]]) is the same for the 551 and the [[555]]. | ||
The filament current for the tubes in the indicator unit is produced by a transformer in the indicator unit, T750 (part number [[120-235]]), that has seven isolated secondaries, each supplying 6.3 V<sub>AC</sub>. | The filament current for the tubes in the indicator unit is produced by a transformer in the indicator unit, T750 (part number [[120-235]]), that has seven isolated secondaries, each supplying 6.3 V<sub>AC</sub>. | ||